【作者】 尚睿； 高成发； 潘树国； 汪登辉； 张瑞成；

【Author】 Shang Rui;Gao Chengfa;Pan Shuguo;Gao Wang;Zhang Ruicheng;School of Transportation, Southeast University;School of Instrument Science and Engineering, Southeast University;

【机构】 东南大学交通学院； 东南大学仪器科学与工程学院；

【摘要】 模糊度正确固定是保障RTK技术高精度定位的前提,单系统情况下,低高度角卫星在城市峡谷等受遮挡区域不可见,容易限制RTK的使用范围。本文在融合BDS/GPS/Galileo三系统基础上,根据三条不同长度基线分析了10°-35°情况下基线模糊度解算情况和定位情况。研究结果发现,随着截止高度角的不断增加,模糊度解算Ratio值也随之增大,当截止高度角为35°时,三条基线三系统融合模糊度固定成功率达到97.8%以上。此外,在35°高度角情况下,多系统仍然能够实现高精度定位,而单GPS和单BDS系统都无法实现连续可靠定位。表明多系统融合定位可有效实现高截止高度角情况下的高精度,高可靠性定位,能够有效解决城市峡谷等受遮挡严重地区的定位问题。更多还原

【Abstract】 High precision real-time kinematic(RTK) positioning depends on correct ambiguity resolution. Due to the signal of low-elevation satellites are different to be received under some constrained environments, restricting the use of RTK when there is only one system. The development of the Multi-GNSS brings opportunity for RTK. We briefly introduce the combination of BDS/GPS/Galileo baseline solution, then the AR and positioning performance analysis are done for different cut-off elevation angles, ranging from 10° to 35°. Results show that for combined system, the ratio increase when increasing the cut-off elevations. The AR success rate can reach 97.8% when the cut-off elevation is 35°. It is achievable for combined system to realize successive positioning when the cut-off elevation is 35°while GPS-only and BDS-only system fails. The results indicate that the BDS/GPS/Galileo combined system significantly increase the RTK availability in challenging conditions such as urban canyon and river valleys.更多还原